SDA Anchor Nuts (Spherical Hexagonal Nuts) Self Drilling Anchor (SDA)
SPHERICAL HEXAGONAL ANCHOR NUTS

SDA Anchor Nuts (Spherical Hexagonal Nuts)

Precision machined spherical hexagonal anchor nuts manufactured from Ck45 / micro-alloy steel with certified hardness of HRC 25–30. Specifically designed with a spherical seating face to mate with domed bearing plates, ensuring uniform pre-stressing and load distribution even on inclined rock faces.

Lab Certified Hardness
HRC 25–30 hardness ensures fitting capacity matches bar capacity
Self-Aligning Spherical Face
Prevents bending stress on threaded bars
High Torque Resistance
Withstands heavy hydraulic tensioning and torque setting
Anti-Vibration Security
Maintains long-term clamping force under dynamic rail and blast vibrations
Speak to Geotechnical Engineer
ENGINEERING METRICS

TECHNICAL DATA & SPECIFICATIONS

Certified engineering tolerances, metallurgical grades, and load metrics for heavy geotechnical installations.

SDA Anchor Nuts (Spherical Hexagonal Nuts) — Technical Data Sheet

Quality Assurance Standard: ISO 10208 / EN 14199

# Technical Metric Certified Specification
01
Thread Standards
ISO 10208 Continuous Rope Thread (R25, R32, R38, R51, T76)
02
Key Sizes (Across Flats)
41 mm (R25), 46 mm (R32), 50 mm (R38), 75 mm (R51), 100 mm (T76)
03
Height / Length
35 mm (R25), 45–65 mm (R32), 60 mm (R38), 70 mm (R51), 80 mm (T76)
04
Unit Weight
0.24 kg (R25), 0.25–0.52 kg (R32), 0.60 kg (R38), 1.40 kg (R51), 3.20 kg (T76)
05
Material Grade
Ck45 Carbon Steel (EN 10083-1)
06
Hardness Standard
Lab Certified HRC 25–30
07
Seating Type
Spherical radius seat for domed plate alignment
08
Surface Coating
Hot-Dip Galvanized (ISO 1461) / Bare Steel
100% Ultrasonic flaw tested and batch certified under ISO 9001:2015 QA procedures.
Request Mill Test Certificate (MTC)
Verified Technical Reference

Anchor Nuts Engineering & Load Proof Standards

View Catalog PDF
Critical engineering rule: Through extensive laboratory testing, standard hardness is strictly maintained at HRC 25–30 for anchor nuts to achieve 100% safe application matching the bar yield load limit.
Sigricare Engineering Support
GET IN TOUCH

ENGINEERED FOR EXTREMES.
READY TO ASSIST.

HEAD OFFICE & WORKS

Ground Floor, Plot, No 42 B, Street No. 5, Rajinder Nagar Industrial Area, Rajendra Nagar, Sahibabad, Ghaziabad, Uttar Pradesh 201007

SEND INQUIRY sigricare@gmail.com
DIRECT RFQ DESK

REQUEST PROJECT QUOTATION

ONLINE